diff --git a/.spacemacs b/.spacemacs
index fe7ce52..622f473 100644
--- a/.spacemacs
+++ b/.spacemacs
@@ -1,4 +1,4 @@
-;; -*- mode: emacs-lisp -*-
+;; -*- mode: emacs-lisp; lexical-binding: t -*-
 ;; This file is loaded by Spacemacs at startup.
 ;; It must be stored in your home directory.
 
@@ -32,7 +32,7 @@ This function should only modify configuration layer settings."
 
    ;; List of configuration layers to load.
    dotspacemacs-configuration-layers
-   '(systemd
+   '(
      ;; ----------------------------------------------------------------
      ;; Example of useful layers you may want to use right away.
      ;; Uncomment some layer names and press `SPC f e R' (Vim style) or
@@ -51,16 +51,16 @@ This function should only modify configuration layer settings."
      latex
      markdown
      org
+     plantuml
      python
+     ranger
      rust
      shell
      shell-scripts
      spell-checking
      syntax-checking
      version-control
-     yaml
-     treemacs)
-
+     yaml)
 
    ;; List of additional packages that will be installed without being wrapped
    ;; in a layer (generally the packages are installed only and should still be
@@ -237,7 +237,7 @@ It should only modify the values of Spacemacs settings."
    ;; refer to the DOCUMENTATION.org for more info on how to create your own
    ;; spaceline theme. Value can be a symbol or list with additional properties.
    ;; (default '(spacemacs :separator wave :separator-scale 1.5))
-   dotspacemacs-mode-line-theme '(spacemacs :separator wave :separator-scale 1.5)
+   dotspacemacs-mode-line-theme '(spacemacs :separator nil :separator-scale 1.0)
 
    ;; If non-nil the cursor color matches the state color in GUI Emacs.
    ;; (default t)
@@ -255,6 +255,7 @@ It should only modify the values of Spacemacs settings."
    ;; The key used for Emacs commands `M-x' (after pressing on the leader key).
    ;; (default "SPC")
    dotspacemacs-emacs-command-key "SPC"
+
    ;; The key used for Vim Ex commands (default ":")
    dotspacemacs-ex-command-key ":"
 
@@ -388,8 +389,8 @@ It should only modify the values of Spacemacs settings."
    ;; If set to `t', `relative' or `visual' then line numbers are enabled in all
    ;; `prog-mode' and `text-mode' derivatives. If set to `relative', line
    ;; numbers are relative. If set to `visual', line numbers are also relative,
-   ;; but lines are only visual lines are counted. For example, folded lines
-   ;; will not be counted and wrapped lines are counted as multiple lines.
+   ;; but only visual lines are counted. For example, folded lines will not be
+   ;; counted and wrapped lines are counted as multiple lines.
    ;; This variable can also be set to a property list for finer control:
    ;; '(:relative nil
    ;;   :visual nil
@@ -402,8 +403,9 @@ It should only modify the values of Spacemacs settings."
    ;;   :size-limit-kb 1000)
    ;; When used in a plist, `visual' takes precedence over `relative'.
    ;; (default nil)
-   dotspacemacs-line-numbers t
-   ;; Code folding method. Possible values are `evil' and `origami'.
+   dotspacemacs-line-numbers nil
+
+   ;; Code folding method. Possible values are `evil', `origami' and `vimish'.
    ;; (default 'evil)
    dotspacemacs-folding-method 'evil
 
@@ -482,14 +484,14 @@ It should only modify the values of Spacemacs settings."
    ;; (default nil)
    dotspacemacs-whitespace-cleanup nil
 
-   ;; If non nil activate `clean-aindent-mode' which tries to correct
-   ;; virtual indentation of simple modes. This can interfer with mode specific
+   ;; If non-nil activate `clean-aindent-mode' which tries to correct
+   ;; virtual indentation of simple modes. This can interfere with mode specific
    ;; indent handling like has been reported for `go-mode'.
    ;; If it does deactivate it here.
    ;; (default t)
    dotspacemacs-use-clean-aindent-mode t
 
-   ;; Accept SPC as y for prompts if non nil. (default nil)
+   ;; Accept SPC as y for prompts if non-nil. (default nil)
    dotspacemacs-use-SPC-as-y nil
 
    ;; If non-nil shift your number row to match the entered keyboard layout
@@ -509,11 +511,11 @@ It should only modify the values of Spacemacs settings."
    dotspacemacs-pretty-docs nil
 
    ;; If nil the home buffer shows the full path of agenda items
-   ;; and todos. If non nil only the file name is shown.
+   ;; and todos. If non-nil only the file name is shown.
    dotspacemacs-home-shorten-agenda-source nil
 
    ;; If non-nil then byte-compile some of Spacemacs files.
-   dotspacemacs-byte-compile nil))
+   dotspacemacs-byte-compile t))
 
 (defun dotspacemacs/user-env ()
   "Environment variables setup.
@@ -545,7 +547,6 @@ layers configuration.
 This is the place where most of your configurations should be done. Unless it is
 explicitly specified that a variable should be set before a package is loaded,
 you should place your code here."
-  (setq powerline-default-separator 'nil)
   (setq dired-listing-switches "-alh")
   (setq-default dotspacemacs-configuration-layers
                 '((
@@ -572,7 +573,7 @@ you should place your code here."
             ("T" "todo list item with source" ; name
              entry                          ; type
              (file+headline org-default-notes-file "Tasks")
-             "* TODO %?\n %a \n DEALINE: %^T \n %i") ; template
+             "* TODO %?\n %a \n DEADLINE: %^T \n %i") ; template
 
             ("m" "scheduled meeting"        ; name
              entry                          ; type